Helicopter



FIG. 1 is a perspective view of a helicopter showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an enlarged detailed view of FIG. 1 as shown in circle 8 in FIG. 1;

FIG. 9 is an enlarged detailed view of FIG. 1 as shown in circle 9 in FIG. 1;

FIG. 10 is an enlarged detailed view of FIG. 1 as shown in circle 10 in FIG. 1;

FIG. 11 is an enlarged detailed view of FIG. 2 as shown in circle 11 in FIG. 2;

FIG. 12 is an enlarged detailed view of FIG. 3 as shown in circle 12 in FIG. 3;

FIG. 13 is an enlarged detailed view of FIG. 3 as shown in circle 13 in FIG. 3;

FIG. 14 is an enlarged detailed view of FIG. 3 as shown in circle 14 in FIG. 3;

FIG. 15 is an enlarged detailed view of FIG. 4 as shown in circle 15 in FIG. 4; and,

FIG. 16 is an enlarged detailed view of FIG. 5 as shown in circle 16 in FIG. 5. 

CLAIM The ornamental design for a helicopter, as shown and described. 